Concrete placement machine



' C. JACKSON CONCRETE PLACEMENT MACHINE Sept. 21, 1948.

Fild Feb. 1, 1946 2 Shee-ts-Shet '1 .v i Q,

I NM 3 Q INVENTOR. I

K /"W/V/ Mad/1500' BY r 0%? W v sept' 1948- c. JACKSON 2,449,851 CONCRETE PLACEMENT MACHINE Fiied Feb. 1, 1946 2 sheets-sheet- 2 I mmvma. 60/.4V/// (Ma isa/7 Patented Sept. 21, 1948 T OFFICE CONCRETE PLACEMENT MACHINE Corwi ll Jackson, Ludington, Mich., assignor to" Jackson Vibrators, Ina, Ludington, Mich., a

corporation of Michigan Application February 1, 1946, Serial No. 644,921

a Claims. (01. 94-45 This. invention relates crete placement machines.

The main objects of this inventionarez: 1 First, to provide a concrete placement machine or apparatus which is highly eificient and atthe same time well adapted for manual manipulation.

Second, to provide a concrete placement machine or apparatus which may be readily adjusted for use in the laying of concrete slabs or strips.

of different Widths.

Third, to provide a concrete placement machine or apparatus which is adapted for the laying of. concrete slabs or strips close to a wall or the like and for use in relatively confined spaces. M

Fourth, to provide a. concrete placement ma chine having these advantages which is quite easily operated and which.may be manipulated to produce a finished surface and to make a second pass over a surface in the eventinsufficient material was supplied in the first instance I to produce the desired grade orin the event further screeding is desired for finishing purposes or for any other purpose.

Fifth, toprovide a machine having these advantages which is comparatively simple in structure and light in weight and at the same time highly efiicient. Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a fragmentary plan view of a machine or apparatus embodyingmy invention illustrated in operative relation to forms and in relation to a wall to illustrate certain adaptations thereof, the left hand guard or retaining member being omitted, the handle being partially shown in its collapsed position by dotted lines.

Fig. 2 is an enlarged fragmentary view in sectionon line 2--2 of Fig. 1. l i

Fig.3 is an. enlarged fragmentary view in section on line 3-3 of Fig. 1. I

Fig. 4 is an end elevational view somewhat enlarged looking from the right of Fig. 1.

- Fig. 5 is an enlarged'fragmentary View on a line corresponding to line 5--5 of Figs. 1 and 4 showing details of, the adjustable handle, the latch member for holding the handle in its extended position being shown in disengaged position bydotted lines.

Fig. 6 is an enlarged fragmentary view on a line corresponding to line 6-6.0f Fig. 4.

toimprovements in con- 1 2 j Fig. 7 is a fragmentary view showing certain details of the connecting means for the screed members. i 1 i H The embodiment of my invention illustrated comprises a .front vibratory member I and, a trailing screed 2.. These members are desirably plank-likethat is, they may be formed of plank like pieces of timber disposed vertically edgewise. The vibratory members are both of such. height as to rearwardly support a mass of concrete, the member I, however, being desirablysubstantially wider than the member 2 as themember ;I is designed to support the concreteor to permit the concrete to pile up against the same as,;it is advanced against, the concrete. l i The vibratory member I has an electric motor 3 mounted thereon,-the.rotor 4 of the motor hav-, ing an unbalancing weight 5 mounted thereon as is shown by dotted lines in Fig. 3. This results in vibrating the vibratory member I at high, fre quency. The electrical connections to thecmotor are indicatedat 6 but it willbe understood that the unbalanced rotor might be driven by a flexible shaft; i

The vibratory member and screed are connected to be manipulated as a. unit,.the connections being of such character as to absorb the vibrations so that the screed member. has relatively little vibratory movement or the vibrations are substantially eliminated therefrom. These connections are designated generally by the numerals l, I and 8,. 8.. i I i v The connections I. consist of. angled. bracket members 9 secured to the screed member 2. The angled bracket member I!) is secured to the plate I I which is in turnconnected by the resilient or cushioning members l2 tothe rear side, of the vibratory memberl by means of the angled plates I3.. Similarly angledplatesM securedtothefront side of the member! are connected by the resilient members I5 to the plate I6, bolts I1 extending through the brackets I0 and thebracketI 8 on the front side of the plate IS. The bolts are arranged through holes I9 in the vibratory member. To provide for aligning or paralleling the members I and 2, tie p1ates20 andZI are bolted tothe angle brackets 9 and I 0, the boltopenings 22 being of a diameter larger than the securing bolts123 so that the members may be adjusted relative to each other to bring them into parallel form. This is illustrated in Fig. 7 where the members I and z are slightly inclined. but are in parallel relation. In the other figuresthey are vertical. J

The coupling members 8 comprise the nonextensible flexible tubes 24. formed of pieces of reinforced hose, the ends of these being engaged on studs 25 on the opposed sides or" the members I and 2, the members 24 being clamped thereon by the clamps 25 which are similar to hose clamps. This provides an effective coupling or connection for the members I and 2, permitting vibration of the vibratory member and minimizing or substantiallyeliminatin'g; thevibration of the screed. The members I and 2 are thus connected as a unit and serve to mutually coact in supporting each other for manipulation as a unit upon the forms or other supports 21. A I g a In the embodiment illustrated, the members I and 2 are provided with angle on shoes 28 and 29 respectively.

The handle designated generally by the numeral 30 comprises the 01.112812.FGIGSGQDiHgtubll;

lar section 3| having diverging arms 32 extending rearwardly from its front end, the arms having downturned ends 3 3- which engage the sockets 34 o-n the front side (ifthe screed member 2.

section 35 of the handleis provided with a handle bar 36 and is telescopically associated within' the "section"3l to be collapsed withthe rear'e'nd of the section 35 projecti 'ng rearwardly of the screed member" as shown'by dotted lines iri-Fig.1*."""

The objectsof collapsing the handle are twofoldone bei'ng' to permit manipulation ol the enga e the hook 42 on the vibratory member 1-, see Fig. 5. The latch 40 has a flexible section 43= by which the stud tl is carried. 1 This serves as -a shock or vibration reducingmeans.

The spring d'etentcarried by'the cross piece 45' extending'betw een' thearms 32' engages. the notch 46- in the membert l and a corresponding 4 variation in spacing which is a. feature that has very substantial merit.

The vibratory member is provided with flexible loop-like retaining members 53, only one of them being illustrated in Fig. 1 as in the event the machine is used along side of a wall it is usually not objectionable if the .concrete flows over" the form'. These retaining members are adjustably mounted on pairs of parallel rods 54 carried by the spaced brackets 55 on the front side of the vibratory member.

The. guard members or retaining members 53 are in the form of loops of relatively stifi but somewhat flexible material such as reinforced belting, their inner ends being bolted to the clamp member 5 5, a coacting clamp 51 being notch orrecess 41 in t'he section 35 as shown: in

dotted outline in Fig. 1..

I have shown the bolt 38 as a locking means fortli'e' handle but the bolt may be omitted partiou-l'arly if it is not desired; to lock the handle member its collapsed: position. i l

The screed is provided? with' rearward ly projecting arms 48 and" 49 which carry the shaft 511) on which the rollers 51 are adjustably secured; the rollers being mounted between collars 52 adapted to be secured to theshafts in their adfiust'ed positions. These rollers are normally out of engaging position when the screed and vibratorymember are in operative supported relation to. the forms. This: permits the tilting of the machine onto. the rollers to lift the vibratory and screed members from operative position for movement of the machine: on the rollers. This: is desirable where a second pass over the material being placed is: desired-as: a. result of there not being sufficient material: supplied inthe first instance. to producerthe 'desired-fstrilce off level: or: where it is: desired. to.- geta more com plete or perfect screeding' fihish." Withthis ad justable? arrangement of. the. rollers; the. machine is adaptedi for use. on. forms. having. quite a; wide provided; tosecure the members 53 in their adjusted positions on the rod.

The guard members are normally positioned over the forms as shown at the right hand side of Fig; 1. If desired, where. onelof theform members is close to a wall, the. guard..member shown by dotted lines at 58 may be secured to the supporting bracket 59. These retaining members serve to retain the vibrated concretethat is, they prevent its. overflowing the form member and also serve. as brushes or wipers. to prevent objectionable accumulation of! concrete on the form members.

The screed member is provided with adjust.-

able retaining members 611; carried by the .clamps 61 secured to the screed member by means of the set screw conventionally shown at. 8.2. Ordinarily these members-F are adjusted so that they are positioned above the forms as shown at the right in Fig. 1. Again only one of these members is illustrated "in the accompanying drawings but itwill' be understood that a second one is provided for use where one of thefor'ms isnot positioned close toa' wall. The machine or apparatus is easily'manipu lated by the workmeniand is capable' of being manipulated in confined'spaces and cl'oseitothe wall of a building or the like as indicated at 63 in Fig. 1.

The machine is of large capacity and highly efiicient and has awide range ofadaptation. I have. not attempted to illustrate or describe the various possible. adaptations. or. embodiments which I contemplate as it is believedjthatfthis disclosure. will enable. those skilled in the art to embody or adapt the invention as may be desired.

Having thus described my invention, what I claim as; newand-des-ire to-, s.ecure byLetters Pat ent, is,:, v

In a concrete ac men ma hi e. t e m.- inat n. t r ankr h r ors ember d p ed v rt a ly dserv se and. adapted, liQLSu'p-r port forwardly thereot, a substantiafll mass; crema -v oreteas. it is advanced against the; same, a plankshaped screed member disposed vertically edgewise in substantially: rearwardly: spaced relation to said vibratory membergvibr'atiorr. absorbin connections b.etween..saidl..=vibratory and screed members, whereby they. are. connected as. a. unit andacoaotto; mutually: support, each other in uprightposition, an electric; motor. having anunbaljanced rotor mountedon said vibratorymember a handle comprising innera'rid outer telescopic; sectionsj one sectibmbeing provided with diverging arms secured to the rear member,- the other sec.- tion being provided with a handle bargloclcing means on said vibratory member; alatcliemem ber mounted on the rearend of said; other section for engagement with the locking means when the handle is in extended position,.said latch member having a flexible vibration absorbing portion between the handle and the vibratory member,

' means for coupling. said handle sections, in col- ,lapsed position, androller supporting arms projecting rearwardly from said screed member and provided with rollers at their rear ends whereby ..the machine may be tilted on the rollers to lift thevibratory and screed members from operative position for translation of the machine onthe rollers, the rollers being normally out of engagement with forms on which the vibratory and screed members may be supportedin operative position to work. I

i 2. In aconcrete placement machine, the combination of aplank-shaped vibratory member disposed edgewise and adapted to support forwardly thereofa substantial mass of, concrete as it-is advanced againstthe same a plank-shaped screed member disposededgewise in substantially rearwardly spaced relation to said vibratory member, vibration absorbing connections between said vibratory and screed members whereby they are connected as a unit and coact to mutually support each other in upright position, an electricmotor having an unbalanced rotor mounted on said vibratory member, a handle comprising inner and outer telescopic sections, one section being providedbwith diverging arms secured to the rear member, the other section being provided vwitha handle bar, locking means on-said vibratory mem ber, a latch member mounted on the rear end of said other section for engagement with thelocking means when thehandle is in extended position, said latch member having a fiexible vibra- .tion absorbing portion between the handle and the vibratory member, and roller supporting arms projecting rearwardly from said screed member yandprovided with rollers" at their ,rear ends whereby themachine may be tilted onthe rollers to lift the vibratory and screed members from operative position for translation of the machine ,on the, rollers, the rollers being normally out of engagement with forms on, which. the vibratory and screed members may be supported in opera- --tive position to work. 3., In a concrete placement machine, thecombination of a vibratory member adapted to sup-,

'' port forwardly thereof a substantial mass ofconcrete as it .is advanced against the same, a screed -member disposed rearwardly of said vibratory member, vibration absorbing connections between said vibratory and screed members whereby they are connected for manipulation as a unit, means for vibrating said vibratory member, a handle comprising inner and outer telescopic sections, one section being secured to the screed member, vibration absorbing means detachably connecting; the other section with the vibratory member when the handle is extended, and means for coupling said handle sections in extended position.

4. Ida concrete placement machine, the combination of a vibratory member adapted tosupport forwardly thereof a substantial mass of concrete as it is advanced against the same, a screed member disposed rearwardly of said vibratory member, vibration absorbing connections between *said vibratory and screed members wherebythey are connected for manipulation as a unit, means for vibrating said vibratory member, a handle comprising inner and outer telescopic sections, one section being secured to the screed member, and vibration absorbing means detachably con- ,nectingthe other section with the vibratory mem- ..ber when the handle is extended.

5. In aconcrete placement machine, the combination of; a plank-shaped vibratory member disposed vertically edgewise and adapted to support, forwardly thereof a substantial mass of [concrete as it is advanced against, the same,,a plank-shaped screed member disposed vertically edgewise insubstantially rearwardly spaced relation to saidvibratory member, vibration absorbingconnections between said vibratory and screed I of the machine onthe rollers, the rollers being normal-1y out of engagement with forms onwhich thevibratoryand screed members may be supported in operative relation to work. M 6. In aconcrete placement machine, the combination of a plank-shaped vibratory member disposed vertically edgewise and adapted tdsupport forwardly thereof a substantial mass of concreteas itis advanced against the same, a plankshaped screed membendisposed vertically edgewise in substantially rearwardly spaced relation to said vibratory member, vibration, absorbing connections between saidvibratory and, screed members whereby they areconnected as a unit and coact to mutually support-each other in upright position, means for vibratingsaid vibrasaid vibratory member. a c 8." In a concrete placement machine, the combination of a vibratorymember adapted to support forwardly thereof a substantial mass of contory member at high frequency, a handle secured to said screed member, and a vibration absorbing connection betweensaid handle and said vibratorymember. l I

. 7. In a concrete placementmachine, the combination of a vibratory member adapted to sup- ,port forwardly thereof a substantial mass of ma- .terial asit is advanced against the same,- a screed member disposed at the rear of said vibratory member; means for vibrating said vibratory member at .highfrequency, vibration absorbing connections between said members whereby they are connected for manipulation as-a unit, a bandle connected to the screed member, and vibration absorbing means connecting the handle to crete as it is advanced against the same, a screed member disposed rearwardly of said vibratory member? vibration absorbing connections betweensaid vibratory and screed members whereby they are connected for manipulation as a unit,

means for vibrating said vibratory member, a

handle projectingforwardly of said vibratory member, and rollers mounted at the rear of said screed member on which the machine maybe tilted to lift the vibratory and screed members from operative relation to work and for translation ofthemachine on the rollers when the handle is lifted, the rollers bein normally elevated when the vibratory and screed members are in operative relation to work. I

9. In a concrete placement machine, the combination of a vibratory member adapted to support forwardly thereof a substantial mass of concrete as it is advanced against the same, a screed 

